Re: The Progression of Kit278 January 17, 2014 11:47AM |
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Re: The Progression of Kit278 January 18, 2014 11:19AM |
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Re: The Progression of Kit278 January 18, 2014 11:48AM |
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Re: The Progression of Kit278 January 18, 2014 04:54PM |
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Re: The Progression of Kit278 January 18, 2014 05:07PM |
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Re: The Progression of Kit278 January 20, 2014 03:25AM |
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Re: The Progression of Kit278 January 20, 2014 04:17AM |
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victors
Pictures. Will do some soon. I usually take pictures with my cellphone, but the interference usually crashed the Duet, so I don't take it into the lab (yet).
Re: The Progression of Kit278 January 20, 2014 04:29AM |
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victors
5) I still need to build something to help me level the bed. I got some longer screws. Will come up with something simple I hope.
Re: The Progression of Kit278 January 20, 2014 07:05AM |
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Re: The Progression of Kit278 January 21, 2014 05:24AM |
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Re: The Progression of Kit278 January 21, 2014 01:24PM |
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Re: The Progression of Kit278 January 22, 2014 03:39AM |
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Re: The Progression of Kit278 January 22, 2014 10:13AM |
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Re: The Progression of Kit278 January 22, 2014 11:17AM |
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dmould
Well, having been bitten by the 3D printing bug, I will probably design & build a completely different, beefier machine during the year as a hobby, using experience I'm gaining while using & modifying this one. Probably basing it on one of the many RepRap proven designs. The problem with mass-produced goods is that the designer is constrained by having to save pennies on each part (as I know very well). A one-off build has fewer penny-pinching constraints, and if a better part costs a few dollars more, it's a no-brainer to spend the extra. You can also use any part that is currently available without having to worry about it going out of production in 2 years time, which is another headache for commercial designs. It will be possible to use more powerful motors and over-design for longevity. There's also the possibility of fitting a rotary encoder to the shaft so missed steps are detected - or even using a DC motor with rotary encoder instead of steppers.
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dmould
The main design limitations I see in the Ormerod is the fact that the X-axis is hanging in mid-air at one end - any small wobbles are therefore magnified at large X positions (and I see it visibly wobble in use, no matter how tight the Z runner bearing). Also the extruder is hanging on a single bearing on that axis. My Perspex has a very slight small hollow at one place that the bearing rolls over, which is faithfully reproduced in all my prints.)
Re: The Progression of Kit278 January 22, 2014 11:20AM |
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Re: The Progression of Kit278 January 22, 2014 01:43PM |
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dc42
I'm not sure you would gain very much. The steppers work reliably for me, except when there have been firmware bugs that cause them to be driven too fast. The only penny-pinching I see is in the selection of a low-end ATX PSU - but the ones supplied appear to be adequate at least for PLA printing. Because ATX PSUs are so standard, it is a simple matter to substitute a better one, such as the Corsair CX430M that I am now using.
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dc42
Then why not replace the Perspex by a flatter and perhaps thicker piece, or by aluminium? I think it is necessary for the extruder to hang on a single bearing, so that if the print goes wrong and a glob of plastic gets extruded, the head can ride over it.
Re: The Progression of Kit278 January 27, 2014 05:01AM |
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Re: The Progression of Kit278 January 27, 2014 05:06AM |
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Re: The Progression of Kit278 January 27, 2014 10:01AM |
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Re: The Progression of Kit278 January 27, 2014 10:13AM |
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download one from thingiverse (check out the video on the page) [www.thingiverse.com]Quote
victors
Currently I am looking to buy that hobbed element, in extruder, but nobody stocks it over here.